Laminated bottle and pump device therefor

ABSTRACT

A laminated bottle including a bottle body having at least two layers, an outer layer and an inner layer, in order to prevent the outside of the bottle from collapse under a reduced pressure inside the bottle. The inner layer of the bottle body and the outer layer adjacent the inner layer are made to be freely peelable from each other, with the inner layer and the outer layer being at least partially bonded together at bonding band and locking portion locations. As the inner layer is peeled away from the outer layer and collapsed in a bag-like configuration upon vaporization or emptying of the bottle contents, deformation of the outer layer is not likely to occur.

TECHNICAL FIELD

The present invention relates to a laminated bottle comprising at leasttwo layers, and more particularly to a laminated bottle wherein aninnermost layer may be freely peeled away from an outermost layer toform an independent inner bag, and a pump device designed for exclusiveuse for such a laminated bottle.

BACKGROUND TECHNOLOGY

A laminated bottle is known, wherein said bottle comprises at least anouter layer and an inner layer, said outer and inner layers being bondedtogether integrally over their whole surfaces so that these two layersmay not be peeled away.

It has been sometimes experienced that a pressure inside the bottle maybe reduced due to the evaporation of contents, such as, for example, anoxygen, long after the filling of the contents, even when the bottle isin a closed condition. Another type bottle is also known, wherein a pumpis attached to a mouth portion of the bottle and said pump is actuatedto expel the contents. In this type of bottle, the pressure inside thebottle may be reduced as the contents are being emptied by the pump.

In such a case, as shown in FIG. 56, there may arise a problem that theconventional laminated bottle may have its inner layer 1 and its outerlayer 2, which is a principal body of the bottle, collapse to give away,and thereby deteriorating the product in its commercial value.

Moreover, said deformation may take place irregularly, and thus thecontents may tend to build-up upon irregular portions on the inner layercreated by deformation, even if the mouth portion is located to facedownwardly, and thereby interfering with a metered and efficient removalof the contents.

It is a technical object of the present invention to prevent the outershape of the bottle from being deformed, which would otherwise occur dueto a reduced pressure inside the bottle.

DISCLOSURE OF THE INVENTION

The laminated bottle in accordance with the present invention has aconstruction as that to be described hereinbelow.

That is, the present invention provides a laminated bottle, said bottlecomprising a bottle mouth portion formed at the upper portion of thebody portion and a bottom portion at the lower portion of the body, saidbottle being formed from at least two layers, i.e., an outer layer madefrom synthetic resin and an inner layer made from flexible syntheticresin, wherein the inner layer of said bottle body portion and an outerlayer adjacent to the inner layer are formed to be freely peelable, andat least a portion of said inner layer and outer layer are bondedtogether by means of a bonding band,

wherein said bonding band is provided longitudinally along a the bottlebetween said bottle mouth portion and the bottle bottom portion,

one or more inner layers being bonded together at a rib on a bottomparting line to be formed in molding the bottle,

one or more outer layers being formed so that they may form a slitthrough which air may flow between said outer layer and inner layerwithout allowing outer layers to contact each other, and

a lock portion being provided on at least a portion of the bottom ofsaid bottle for retaining said outer and inner layers integrally.

In the present embodiment, it is only required that the inner layer maybe freely peeled away from the outer layer. Consequently, the number ofinner and outer layers may be selected arbitrarily, as long as there aretwo or more layers.

By such a laminated bottle arrangement, any adverse effect may not beimposed upon the shape of the bottle for a longer period after contentsare filled, when the volume of content is reduced to lower the internalpressure inside the bottle or when the bottle internal pressure isreduced by emptying the content by a pump. This is because said innerlayer is pulled to separate away from said outer layer under a negativepressure, and thus the inner layer may become an independent bag thatmay shrink and be deformed separate from the outer layer.

Complete removal of the content from the bottle with no residue isdesired. However, a satisfactory result may not be derived from theshrinkage of the independent bag formed from the inner layer.

Thus, it becomes necessary to provide a restriction or control againstthe shrinkage of the inner bag. It is therefore an object of the presentinvention to provide means of physically controlling such shrinkage or amanner in which the inner layer may be collapsed.

Accordingly, the present invention provides a laminated bottle, saidbottle comprising a bottle mouth at the upper portion of the bottle bodyand a bottom at a lower portion of the body, said bottle consisting ofat least two layers i.e., an outer layer and an inner layer, wherein theinner layer of said bottle body and the adjacent outer layer are made tobe freely peeled away from each other, and at least one of said innerlayer and outer layer is bonded together by means of a bonding band, andwherein said bonding band is provided at the bottle body to runlongitudinally from said bottle mouth portion toward the bottom portion.

When the bottle has an elliptical shape in cross-section, it is morepreferable that the bonding band be provided on the body located atopposite ends of the major axis of the elliptic. Though at least one ofbond band is provided, a plurality such bands may be selected.

The bottle is molded in accordance with a so-called Parison-blowprocess, but inner layers are bonded with each other at a rib on abottom parting line to be formed during a molding step, while outerlayers are not bonded with each other. Thus, a slit through which aircan be withdrawn is formed between inner and outer layers. Described inmore detail, it may appear that outer layers are bonded to each othertemporarily during a molding step, but they may be easily cracked alongthe parting line, to form the slit, by pushing the parting line from theoutside using a push-rod. In this way, it becomes possible to withdrawair as the inner layer is deformed, thereby preventing deformation ofthe outer layer which would otherwise occur due to a close contactbetween outer and inner layers. Furthermore, the bottle is provided atleast partially thereof with a lock portion that acts integrally toretain the outer and inner layers to be integral. Thus, because thebottom portion of the inner layer is locked against the bottom portionof the outer layer, when the bag made from the inner layer shrinks, theinner layer is not lifted-up at its bottom portion. Accordingly, the bagmade from the inner layer may be shrunk to a preferable configuration.

Moreover, if the bottom portion is lifted up to an interior of thebottle, a slit in the bottom portion may be spaced away from a floorsurface upon which the bottle may be laid, thereby making it possible toprevent water flowing over the floor from entering into a space betweenouter and inner layers, for example, when the present bottle is used ata bath room.

Laminated parisons are made beforehand during the manufacture of thebottle. During this manufacture, a bonding layer is provided in aband-like configuration between inner and outer layers. Laminatedparisons are sandwiched using a split die in which the bottle may bemolded, and the bottle is produced by supplying air into the laminatedparisons. After production, the slit is formed by impacting upon thebottom portion, which is carried out as above-described.

In the laminated bottle of the present invention, any adverse effect maynot be imposed upon the shape of the bottle for longer periods of timeafter contents are filled, when the volume of content is reduced tolower the internal pressure inside the bottle or when a pump is attachedto the mouth portion to pour out the contents, because said inner layeris pulled away from said outer layer to be separated under a negativepressure, and only the inner layer may become an independent bag thatmay shrink and deform.

Additionally, a deformed configuration can be predetermined for thebottle when the inner layer is deformed by bonding the inner and outerlayers at their particular portions beforehand, and thus it allows aneasy and efficient removal of the contents from the bottle, even whenthe inner layer is deformed.

When inner and outer layers are bonded together at least partially bymeans of adhesive, and if a single length of bonding band is formed atleast on the body portion longitudinally from the bottle mouth portiontoward the bottom portion, the shrinkage of the bag which is formed fromthe inner layer at the bonding band may be restricted, and therebyallowing one to specify the deformation shape for achieving an efficientremoval of the contents.

When the lock portion is provided at least partially on the bottomportion for retaining outer and inner layers integrally, the bag whichis formed from the inner layer and which shrinks may not be lifted upthereby contributing much to an efficient removal of the contents.

The laminated bottle in accordance with the present invention ispreferred for use in conjunction with a pump device which will bedescribed hereinbelow.

Where the pump device having a suction pipe which depends into thebottle is attached to the laminated bottle of the present invention, asshown in FIG. 41, no problem will be encountered during an early stageof application, but as the volume of contents reduce, the bag made fromthe inner layer tends to intimately adhere to the suction pipe therebyinterfering with the smooth flow of the contents and closing off theopened end of the suction pipe preventing removal of the content.

By allowing the bag made from the inner layer to intimately contact withthe suction portion at the time of emptying, it becomes possible toprevent the contents which are present on the upper section of thebottle from falling down to the tip end of the suction pipe, and thusthe contents may build-up upon the upper portion.

To solve such a problem, it is desirable to provide the pump device ofsuch a construction as described hereinbelow.

That is, a pump device for a container, said pump comprising a suctionportion which is inserted into the vessel to be opened up, and anoperable portion which is exposed to the outside of the container, anarea around said suction portion being enclosed by a bag in which thecontents are contained and which is loaded into the container, whereinsaid suction portion is tubular in the first embodiment, and a concavedor convexed portion which extends in a longitudinal direction is formedon the circumferential surface thereof, wherein a plurality of suctionholes are defined in the end of the suction portion, said suction holesbeing opened to a lateral surface.

In such a pump device, it may be probable that the bag, which has beenshrunk, may enter into contact with the lower end portion of the suctionportion and thereby be broken. Thus it may be preferable to form thelower end surface of the suction portion in a curved configuration.

In this case, an annulus can be outfitted to an area closely adjacent tothe base portion of the suction portion, and the annulus may be providedwith a window that is parallel with its axis.

In the construction of the pump as above-described, the suction portionmay be opened up at the lower end of the pump in a second embodiment,and the suction portion may comprise a rod which opens to the lower endof the pump to extend from an area in the vicinity of the suctionportion. The rod may be constructed with such a cross-section in whichsheets extend in two or more directions.

It may also be probable that this rod may come into contact with thelower end of the bag and be broken when the bag is shrunk, and so itwould be preferable to form the rod in a curled configuration.

Furthermore, an annulus may be outfitted to a section which extends fromthe suction portion to the pump, and the annulus may be provided with awindow that runs parallel to its axis.

It is also preferable that a tubular connecting portion may be providedat the suction portion itself for coupling with the pump, and a grooveportion may be provided along a circumferential surface of thisconnecting portion so that the contents may flow therethrough.

In accordance with the first embodiment, a clearance is formed betweenthe bag which is loaded into the container and the suction portion bymeans of a concaved or convexed portion which is provided on an areaaround the suction portion, and thus the bag does not intimately contactwith the suction portion.

Any adverse effect may not be imposed upon the shape of the bottle forlonger periods after contents are filled in the laminated bottle of thepresent invention when the volume of content is reduced to lower theinternal pressure inside the bottle or when the pump is attached to themouth portion to empty the contents because said inner layer is pulledaway from said outer layer and separated under a negative pressure.Thus, the inner layer may become an independent bag which may shrink anddeform. In such a case, the inner layer which corresponds with the bagto be peeled away does not intimately contact with the suction portion.

An oiling passage may thus be ensured even when the volume of thecontents reduce and, consequently, a substantially whole content can bedischarged smoothly.

In the first and the second embodiments, it is possible to prevent thebag from being broken by forming the lower end of the suction portion orof the rod in a curved configuration, even if the shrunk bag may contactwith the lower end.

Because the need of separately arranging an annulus can be eliminated byforming a connecting portion with the pump itself to be in the suctionportion and by forming a longitudinal groove in the circumference of theconnecting portion, the number of parts can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a pictorial view showing a laminated bottle in the firstembodiment of the present invention;

FIG. 2 is a cross-sectional view showing how the bag which is formedfrom the inner layer is collapsed when it is provided with a singlebonding band;

FIG. 3 is a cross-sectional view showing how the bag which is formedfrom the inner layer is collapsed when it is provided with two bondingbands in an opposing relationship;

FIG. 4 is a cross-sectional view showing the rib (pinch-off portion) onthe parting line on the bottle bottom portion;

FIG. 5 is a cross-sectional view showing the rib (pinch-off portion) onthe parting line on the bottle bottom portion and also illustrating theslit;

FIG. 6 is a front elevation of the laminated bottle according to thefirst embodiment;

FIG. 7 is a bottom plan view of the laminated bottle according to thefirst embodiment;

FIG. 8 is a cross-sectional taken view along the line C--C in FIG. 7;

FIG. 9 is a cross-sectional taken view along the line B--B in FIG. 7,

FIG. 10 is a front elevation showing how the bag which is formed fromthe inner layer is collapsed;

FIG. 11 is a cross-sectional view showing how the bag which is formedfrom the inner layer is collapsed;

FIG. 12 is a front elevation showing how the bag which is formed fromthe inner layer is collapsed in the bottle without a lock portion;

FIG. 13 is a cross-sectional view showing how the bag which is formedfrom the inner layer is collapsed in the bottle without a lock portion;

FIG. 14 is a bottom front elevation of the laminated bottle in thesecond embodiment;

FIG. 15 is a bottom plan view of the laminated bottle in the secondembodiment;

FIG. 16 is a bottom front elevation of the laminated bottle in the thirdembodiment;

FIG. 17 is a bottom plan view of the laminated bottle in the thirdembodiment;

FIG. 18 is a cross-sectional view of the lock portion of the laminatedbottle in the third embodiment;

FIG. 19 is a bottom front elevation of the laminated bottle in thefourth embodiment;

FIG. 20 is a bottom plan view of the laminated bottle in the fourthembodiment;

FIG. 21 is a bottom front elevation of the laminated bottle in the fifthembodiment;

FIG. 22 is a bottom plan view of the laminated bottle in the fifthembodiment;

FIG. 23 is a partial cross-sectional view of essential parts of the pumpdevice in the sixth embodiment;

FIG. 24 is a plan view of the pump device in the sixth embodiment;

FIG. 25 is a bottom plan view of the pump device in the sixthembodiment;

FIG. 26 is a partial cross-sectional view of the pump device in theseventh embodiment;

FIG. 27 is a plan view of the pump device in the seventh embodiment;

FIG. 28 is a bottom plan view of the pump device in the seventhembodiment;

FIG. 29 is a partial cross,sectional view of essential parts of the pumpdevice in the eighth embodiment;

FIG. 30 is a plan view of the pump device in the eighth embodiment;

FIG. 31 is a bottom plan view of the pump device in the eighthembodiment;

FIG. 32 is a partial cross-sectional view of essential parts of the pumpdevice in the ninth embodiment;

FIG. 33 is a plan view of the pump device in the ninth embodiment;

FIG. 34 is a bottom plan view of the pump device in the ninthembodiment;

FIG. 35 is a partial cross-sectional view of essential parts of the pumpdevice in the tenth embodiment;

FIG. 36 is a plan view of the pump device in the tenth embodiment;

FIG. 37 is a bottom plan view of the pump device in the tenthembodiment;

FIG. 38 is a partial cross-sectional view of essential parts of the pumpdevice in the eleventh embodiment;

FIG. 39 is a plan view of the pump device in the eleventh embodiment;

FIG. 40 is a bottom plan view of the pump device in the eleventhembodiment;

FIG. 41 is a side view showing the container with the pump;

FIG. 42 is a partial cross-sectional view of essential parts of the pumpdevice in the twelfth embodiment;

FIG. 43 is a partial cross-sectional view of essential parts of the pumpdevice in the twelfth embodiment;

FIG. 44 is a side view of the annulus in the fourteenth embodiment;

FIG. 45 is a side view of the annulus in the fourteenth embodiment;

FIG. 46 is a perspective view of the annulus in the fourteenthembodiment;

FIG. 47 is a lateral end view of annulus in the fourteenth embodiment;

FIG. 48 is a partial cross-sectional view of essential parts of the pumpdevice in the fourteenth embodiment;

FIG. 49 is a partial cross-sectional view of essential parts of the pumpdevice in the fifteenth embodiment;

FIG. 50 is a partial cross-sectional view of essential parts of the pumpdevice in the sixteenth embodiment;

FIG. 51 is a partial cross-sectional view of essential parts of the pumpdevice in the seventeenth embodiment;

FIG. 52 is a plan view of the pump device in the seventeenth embodiment;

FIG. 53 is a bottom plan view of the pump device in the seventeenthembodiment;

FIG. 54 is a cross-sectional view showing a laminated parison while thelaminated bottle of the present invention is being manufactured;

FIG. 55 is a view explaining the mouth structure of the traditionallaminated bottle; and

FIG. 56 is a view explaining the deformed state of the traditionallaminated bottle.

BEST MOST FOR CARRYING OUT THE INVENTION Embodiments 1-5

FIG. 1 shows the first embodiment 1 of the present invention, whereinthere is provided a laminated bottle, wherein said bottle consists ofinner and outer layers 1 and 2, said bottle comprising a bottle mouthportion 4 at an upper portion of the body with circular or rectangularcross-section, and a bottom portion 5 at a lower portion of the body,said inner layer 1 and said outer layer 2 being bonded togetherpartially. Said outer layer 2 is made from high-density polyethylene,and the inner layer 1 is formed from the nylon layer and a further innerresin layer. The bond layer 3 is formed from Admer (Trade Name).

Admer is an adhesive formulated from a modified polyolefin made byMitsui Petrochemical Industry Co., Ltd. The inner layer 1 can form a bagfor itself when it is peeled away from the outer layer 2.

The mouth portion 4 of the bottle is provided with a pump (not shown)through which contents may be discharged. A pipe is provided throughwhich the contents are sucked such that the pipe may depend from thepump body toward a lower extremity of the bottle.

The material which may be used in the present invention has beenselected initially from the high-density polyolefine (HD, PE) for theouter layer 2, and nylon for the inner layer 1. This arrangement mayensure a sufficient peeling between inner and outer layers, but it maynot be embodied for normal contents since nylon has an increased waterpermeability. Thus, it may be advisable to use a further resin layer,for example, an Admer (Trade Name) layer 1a inside the nylon serving asan inner layer 1. If the thickness of the inner layer is excessive, thebottle is only slightly deformed at the shoulder when the contents aredischarged through the pump, and the bottle may fully collapse,resulting in an excessive residue amount of the contents. The thinnerthe inner layer thickness is, the faster the speed is at which thebottle is collapsed. This results in increased return speed of the pumpand a smooth pump operation.

When the inner layer 18 was formed from a 50 μm nylon layer and the 50μm Admer layer, a satisfactory result was obtained from the viewpoint ofbottle collapse of the bottle and the amount of residues.

As shown in FIG. 1, the bonding layer 3 is provided to run verticallyfrom the bottle mouth 4 to the bottle bottom portion 5 in a band-likeconfiguration passing partially around the outer circumference of theinner layer 1, i.e., the inner circumference of the outer layer 2. Bythe arrangement, the outer and inner layers 2 and 1 are partially bondedtogether by bonding layer 3. That is, the outer layer 2 and the innerlayer 1 can be peeled away form each other, except for the area bondedby bond layer 3. A single length of said bonding band is provided thatruns longitudinally from the mouth portion to the body portion, andfurther to the bottom portion 5.

When the outer layer 2 and the inner layer 1 are bonded together by thesingle length of bonding band in the above-described manner, the bagformed from the inner layer 1, which has been peeled away from the outerlayer 2, as shown in FIG. 2 is stripped away uniformly from the outerlayer 2 and is collapsed in a flat and clean manner at the centralportion of the bottle.

On the contrary, when two lengths of bonding bands are provided inopposing relationship to each other and extending from the mouth portion4 to the bottom portion 5 as shown in FIG. 3, the inner layer 1 may bepeeled away initially to move toward its opposite surface on theopposite inner side of the bottle if the one side surface on the innerlayer is stripped, and the bag made from inner layer 1 is caused tocollapse. This occurs as a result of inconsistent wall thickness of theinner wall 1 (0.01˜0.02 mm) and short and long circumferences due tooffset of the two bonding bands. The layers are usually peeled away fromthe circumferential area of the thin wall thickness side, or a longercircumferential side. If the layer is collapsed in such a manner asabove-described, the collapsed bag formed from the inner bag acts topush the suction pipe, which depends from the body, in a lateraldirection, and thereby imposing an adverse effect even upon the cylinderpiston of the pump body.

The bottle of the present invention is manufactured in the followingsequence.

First, laminated parisons having the cross-section as shown in FIG. 54are injection molded. The bonding layer 3 is provided along the entirelength of the laminated parisons. Then, the laminated parisons aresandwiched in position using a pair of blow-mold dies, and the bottle isformed in accordance with the Blow Molding Process as shown in FIG. 1.

That is, the laminated parison are sandwiched in position by means of apair of blow molding dies and one end of the laminated parison is bittenoff by means of die to provide a bottle bottom. The other end of thelaminated parison is cut-off and then an air inserting core metal isinserted into the other end of the laminated parison. Air is suppliedfrom the core metal into the laminated parison for form the product inaccordance with the blow molding process.

As described, the bottom surface of the bottle bottom is bitten off bymeans of die. This portion (pinch-off portion) which has been bitten-offlies on the parting line of the die. This biting-off produces a rib 11which projects slightly upwardly. This rib which has been produced bybit-off is shown in FIG. 4 and FIG. 5. Inner layers 1 may contact witheach other in this rib when they are bitten-off, whereas the outerlayers 2 may not contact with each other. Thus, an area between theouter layer 2 and the inner layer 1 is caused to crack along the partingline to produce a slit 12, when the area is impacted by, for example,stamping the bottom surface with a rod or the like, after the molding.As a result, an air is caused to flow into a gap between the inner layer1 and the outer layer 2 passing through the slit 12.

Furthermore, the bottom surface is more recessed toward an inner side ofthe bottle at a portion where said slit 12 is produced, compared to acircumferential portion of the bottle. Thus, it may be most preferred toform the portion elevated from a lowermost extremity of the bottlebottom portion. When a recess 14 is formed at a central portion of thebottom as shown in FIG. 6 and FIG. 7, the recess 14 may be formed suchthat it may be transverse with the bottom portion 5 including thecentral bottom portion and a pair of parallel projection strips 15 maybe left as it sandwiches this recess 14 therebetween, as shown in FIG.14, FIG. 15, FIG. 16 and FIG. 17.

In FIG. 14, FIG. 15, FIG. 16 and FIG. 17, a pair of parallel projectionstrips are provided transverse to the parting line, retaining sub-recess14 formed with the rib 11 sandwiched at a central portion of the bottomportion.

Illustrated in FIG. 21 and 22 is a construction, a recessed portion 14cis provided having the rib 11 centrally located therein and three legsforming a leg ledge 16 are provided on the surrounding bottom surface sothat they may project outwardly therefrom. This leg ledge 16 may permitsaid slit portion 12 in the rib portion 11 to be elevated just in thesame manner as that used for recessed portions 14a, 14b and 14c.

Specifically describing the embodiments shown in FIG. 14, FIG. 15, FIG.16 and FIG. 17, said rib 11 (parting line) in which said slit may lie isprovided in the major axis direction of the oblong configuration so thatit may be transverse with the parting line running across the minoraxis. A main recessed portion 14 may be present on the opposite ends ofthe major axis and a pair of parallel projecting portion 5 beingremained on the recessed portion 14. Furthermore, a sub-recessed portion14b is provided which is formed by further depressing the major recessedportion 14 and the projectile portion 15. The bonding band 3 lies on theparting line, whereas the band extends not only to the body of thebottle, but also to the central portion of the bottom portion 5.

In the case of FIG. 14, an interface between the projecting portion 15and the main recessed portion 14 is formed in an overhangingconfiguration. This overhanging portion may allow the inner layer to beoverhung against the outer layer to thereby form a lock portion 17.

Moreover, in order to provide a lock portion which can be used to lockthe inner layer with the outer layer, it can be suggested by way ofexample to provide a convexed lock portion 17 with a C-shapedcross-section in which the projecting portion 15 is projected outwardlyas shown in FIG. 8 and FIG. 9, or alternatively a concaved lock portion17 of a C-shaped cross-section as shown in FIG. 19 and FIG. 21. Theseconcaved or convexed portions may be formed with an overhangingconfiguration in cross-section So that the inner layer may overhang withthe outer layer at the overhanging portion.

This lock portion is preferably provided on the projecting strip portion15 which is opposite the bonding band because this location allows usersto adjust the collapse of the bag by the inner layer. That is, thebonding band 3 is arranged to lie along the left side of the drawing ineach of embodiments shown in FIG. 6, FIG. 7, FIG. 10, FIG. 14, FIG. 15,FIG. 16, FIG. 17 and FIG. 19 to FIG. 22.

In cases where the lock portion 17 is present, the inner layer is lockedin position on the bottom portion 5 and a consistent width may bemaintained as shown in FIG. 10 and FIG. 11 when the inner layer iscaused to collapse. In turn, in the absence of the lock portion 17, thebag which consists of the inner layer may be shifted in a lateraldirection as shown in FIG. 12 and FIG. 13, and may urge the pump, etc.,thereby interfering with the smooth emptying operation of the contents.

After being molded, a trimmer treatment is applied over the mouthportion in order to finish the mouth portion. During this trimmerprocess, a grinding and cutting trimmer is operated to rotate forremoval of burns from the mouth portion. However, the inner layer 1 isin close contact with the outer layer 2. Therefore, the inner layer 1cannot be separated away from the outer layer 2 to prevent itsentanglement around the trimmer by the mere rotation of the trimmer.

Thus, the mouth portions of the outer and inner layers may be finisheduniformly.

As a finishing technique for the mouth portion of the bottle which canbe carried out during the molding step, prior arts are known from U.S.patent application Ser. No. 103,624 filed on Jan. 4, 1971 and theJapanese Patent Application Unexamined Publication No. SHO. 45-31397.These arts use a mandrel which is inserted 10 into the mouth portion anda sleeve which is provided around the mandrel to finish the mouthportion. When this mandrel is inserted into the mouth portion of abottle which contains freely peelable dual layers, the inner layer canbe trailed along together with the mandrel. Thus it has been aconventional practice of overlapping the upper surface of the outerlayer 2 with the inner layer 1 at the mouth portion to prevent the innerlayer from being trailed in a downward direction, as shown in FIG. 55.Because these inner and outer layers are bonded together at the mouthportion in the bottle of the present invention, it is unnecessary toform the inner layer in such a configuration as that shown in FIG. 55.Thus, the bottle can be easily molded.

The bottle is suitable for use, wherein it is adapted to empty theliquid contents by means of a pump, by attaching the pump to the mouthof the bottle. For example, the bottle may be suitable for use as alarge-sized container for shampoo or rinse to be used in the bath room.

In such a container as above-described, the inner layer may be peeledaway from the outer layer and collapsed, upon the pump being actuated toproduce a negative pressure inside the container. In such a case, airmay enter into the clearance to be created between the inner and outerlayers to prevent the collapse of the container made from the outerlayer. In the meantime, such a large-sized container for shampoo orrinse is usually put on the floor surface in the bath room, andtherefore hot water may enter into the outer layer through the slit 12if such slit is provided at a position where the hot water may flood.However, in this embodiment, since the recessed portion 14 is providedso as to segregate the slit 12 away from the floor surface, there may beno chance of the hot water being sucked through the slit.

In the meantime, it may be preferable to provide for means that maymechanically push the bottle from the bottle bottom outer peripherytoward the bottle lower side portion, in addition to a pushing operationto be applied against the pinch-off portion (ribbed portion), in orderto facilitate the peeling of the inner layer and hence the inflow of theair at the bottom portion of the bottle.

Embodiment 6

The laminated bottle of the present invention can be preferably used incombination with a pump device to be described later. The pump device isone which is adapted to prevent a bag which is formed from an innerlayer from making a close contact with a suction portion 34 at the timeof delivery, or ensuring a flow passage of the contents in the bag andthereby facilitating the delivery of contents, even if the bag shouldcontact closely with the suction portion 34, when the laminated bottleof the present invention is attached with a pump device which comprisesa suction pipe which depending into the bottle.

In the meantime, the construction of the pump itself, which is providedat the cylindrical mouth portion 2 of the container 1, is the same asthat in the prior art, and therefore its detailed description isomitted.

This pump device comprises a suction portion 34 which is provided at thelower end of the pump 33, as shown in FIG. 23-FIG. 25, and is providedat the upper end of the pump with an operable portion (not shown) forthe pump 33. The container can use the laminated bottle which has beendescribed in each of above-embodiments. The suction portion 34 isinserted into the bottle, and the suction portion 34 is covered by thebag 1 made from the inner layer. The bag 1 is filled with contents.

In the meantime, when this pump device is used with the laminatedcontainer, even if the inner layer of two layers, i.e., outer and innerlayer, abuts with the above-described bag 1, and the inner layer closelycontacts with the suction portion 34, a flow passage through whichcontents are sucked can be reliably established to deliver the contents.

A ribbed convex portion 38 is formed to run in the longitudinaldirection of the suction portion 4 along its peripheral portion. Four ofsuch convex portions 38 are provided with 90° angular spacetherebetween. Then, four suction ports 40 are formed in the end 39 whichlies below the suction portion 34, each of these suction ports beingopen to the lateral side of the suction portion 34. The four suctionports 40 are provided with 90° space between said convex portions 38.The suction ports 40 each are formed in the configuration of a slit withthe dimension of 1.5 mm in width and 10 mm in length. This suction port40 is further open to the bottom surface of the suction portion 34.

In this embodiment, the suction portion 34 has the overall length of 110mm and the outside diameter of 11 mm, whereas the convexed portion 38has the height of 1 mm.

The convexed portion 38 may alternatively be formed in a concaveconfiguration. That is, any construction can be employed, provided thata flow passage may be ensured into which the contents may drop by thepresence of concave or convex portions along the suction portion 34,even if the bag 1 should contact closely with the outer periphery of thesuction portion 34. In this way, the whole quantity of contents can besmoothly and reliably discharged.

An experiment carried out to compare the residue amount and remainingpercentage of the contents indicated that the residue amount was 36.95 gand the residue percentage was 6.93% respectively.

Embodiment 7

The seventh embodiment of the present invention will be described withreference to FIG. 26 through FIG. 28.

In this embodiment, the suction portion 34 is formed in theconfiguration of a circular orifice portion with a diameter of 7 mmwhich opens at the lower end of the pump 33, rather than being formed ina cylindrical configuration. A rod 41 co-axial with this suction portion34 extends to a position where it may not cover the suction portion 34.The rod 41 is formed by combining the sheet members into a cross-sectionof the Japanese word "" and the center of the rod 41 coincides with thecenter of said suction portion 34. The rod 41 has a length of 91 mm, andan intermediate lateral line of the ""-shaped section has a width of 13mm, and a thickness of 2 mm. In turn, the lateral line which liesvertically has a width of 7 mm, and a thickness of 1.5 mm. Furthermore,a distance between lateral lines which lie in the vertical direction isset to be 9 mm. In the pump device in accordance with this embodiment,the rod 41 may interfere with the bag which has been shrunk, preventingit from closing off the suction portion 34, because the rod 41 liesimmediately below the opening which is the suction portion 34, upon thebag being shrunk. Furthermore, a flow passage into which the contentsflows may be provided by a clearance, i.e., a space to be createdbetween sheet materials which form the rod 41. Consequently, thecontents may not left behind as a residue even if the bag has beenshrunk.

An experiment which was carried out to compare the residue amount andremaining percentage of the contents indicated that the residue amountwas 35.0 g and the residue percentage was 6.78% respectively.

Embodiment 8

The eighth embodiment of the present invention will be described, withreference to FIG. 29-FIG. 31. The suction portion 34 is not cylindrical,but is formed in the configuration of an orifice having a diameter of 7mm that opens at the lower end of the pump 33, like in the embodiment13. A rod 41 co-axial with the suction portion 34 extends to a positionwhere it does not cover the suction portion 34. 20 The rod 41 is formedin a cross-section of the Japanese word "" and the center of the rod 41coincides with the center of said suction portion 34. The rod 41 has alength of 91 mm, and an intermediate lateral line of the ""-shapedsection has a width of 14 mm and a thickness of 3 mm. In turn, thelateral line which lies vertically has a width of 8 mm, and a thicknessof 2 mm. Furthermore, a distance between lateral lines which lie in thevertical direction is set to be 10 mm.

An experiment carried out to compare the residue amount and remainingpercentage of the contents indicated that the residue amount was 28.9 gand the residue percentage was 5.75% respectively.

Embodiment 9

The ninth embodiment of the present invention will be describedhereinbelow, with reference to FIG. 32-FIG. 34.

In this embodiment, the suction portion 34 is formed as a circularorifice portion that is open at the lower end of the pump 33 and has adiameter of 7 mm, rather than a cylindrical configuration, just in thesame manner as that in the previous embodiment. A rod 41 is co-axialwith this suction portion 34 and extends to a position where it does notcover the suction portion 34.

The rod 41 is formed in the configuration wherein three sheets arecombined with each other having a 120° angular difference therebetween,having the rod's center coincide with the center of said suction portion34. The rod 41 has a length of 91 mm, a width of 8 mm for every sheetand a thickness of 1.5 mm.

An experiment carried out to compare the residue amount and remainingpercentage of the contents indicated that the residue amount was 116.11g and the residue percentage was 22.90% respectively.

Embodiment 10

The tenth embodiment of the present invention will be describedhereinbelow, with reference to FIG. 35-FIG. 37.

In this embodiment, the suction portion 34 is formed as a circularorifice portion that is open at the lower end of the pump 33 and has adiameter of 7 mm, rather than a cylindrical configuration, just in thesame manner as that in the eighth embodiment. A rod 41 is co-axial withthis suction portion 34 and extends to a position where it does notcover the suction portion 34.

The rod 41 is formed in a configuration wherein four sheets are combinedin the shape of a crusade, having its center coincide with the center ofsaid suction portion 34. The rod 41 has a length of 91 mm, a width of 8mm for every sheet and a thickness of 1.5 mm.

An experiment which was carried out to compare the residue amount andremaining percentage of the contents indicated that the residue amountwas 81.86 g and the residue percentage was 16.13% respectively.

Embodiment 11

The eleventh embodiment of the present invention will be described, withreference to FIG. 38-FIG. 40.

In this embodiment, the suction portion 34 is formed as a circularorifice portion which is open at the lower end of the pump 33 and hasthe diameter of 7 mm, rather than a cylindrical configuration, just inthe same manner as that in the previous embodiment. A rod 41 is co-axialwith this suction portion 34 and extends to a position where it does notcover the suction portion 34.

The rod 41 is formed in such a configuration, wherein three sheets arecombined with an angular difference of 120°, further combining narrowersheets with an angular difference of 60°, said narrower sheets beingcombined with the angular difference of 120°.

The center of the rod coincides with the center of said suction portion34. The rod 41 has a length of 91 mm with the width of wider sheets of 8mm, whereas the narrower sheet has a width of 5.1 mm and a thickness of1.5 mm.

An experiment carried out to compare the residue amount and remainingpercentage of the contents indicated that the residue amount was 37.97 gand the residue percentage was 7.47% respectively.

In the pump device of the present invention as above-described, a spaceis formed between a bag and the suction portion, and thus it is possibleto prevent the bag from making a close contact with the suction portion,and thereby allowing the contents to be delivered smoothly and totally.

Embodiment 12

In the pump device as shown in the sixth embodiment of the presentinvention, the bag which has been shrunk may contact with and be brokenby the lowermost end of the suction portion which is formed in acylindrical configuration. Therefore, it is preferable to form the lowerend portion of the cylindrical suction portion 34 in a convexed andcurved configuration 42 as illustrated in FIG. 42. Except that thecylindrical suction portion 34 is formed at its lower end portion in thecurved configuration as above described, the construction of the pumpdevice is identical with that in the embodiment shown in FIG. 23.

Embodiment 13

In the pump device in accordance with the seventh embodiment of thepresent invention as shown in FIG. 26, the bag which has shrunk maycontact with and be broken by the lower end of the rod 41 which extendsto a position immediately below an opening which is the suction portion34. Consequently, it may also be preferable to form the lower of thisrod 41 in the convexed curved configuration 43 as illustrated in FIG.43. Except that the rod 41 is formed at its end portion in such a curvedconfiguration as above-described, the construction of the pump device isidentical with that in the embodiment illustrated in FIG. 26.

Embodiment 14

In addition to the pump device of the sixth embodiment of the presentinvention, it may be preferable to outfit an annulus 44 around theabove-described pump 33, as shown in FIG. 44-FIG. 48. The annulus 44 isprovided with six slit-like windows with a 60° angular difference in alongitudinal direction. The window which is formed in this annulus canallow the contents which remains in the upper portion of the bag 1 to beguided in a downward direction and delivered completely.

Embodiment 15

Furthermore, FIG. 49 illustrates a fifteenth embodiment of the presentinvention, wherein the above-described annulus 44 is loaded on the pumpdevice of the seventh embodiment of the present invention shown in FIG.49. Other features of the embodiment 14 are the same as the those in thefourteenth embodiment.

Embodiment 16

FIG. 50 illustrates the annulus 44 which is loaded on the pump device ofthe eighth embodiment of the present invention shown in FIG. 29, as thesixteenth embodiment of the present invention.

An experiment carried out to compare the residue amount and remainingpercentage of the contents indicated that the residue amount was 23.6 gand the residue percentage was 5.75% respectively.

In the meantime, the annulus 44 may be outfitted around the pump 33 inthe embodiments 9-13, just in the same manner as that in the embodiments14-16. The window which is formed in the annulus 44 can allow thecontent which remains in the upper portion of the bag 1 to be guided inthe downward direction and delivered completely.

Embodiment 17

FIG. 51, FIG. 52 and FIG. 53 show a pump device in accordance with theseventeenth embodiment of the present invention. The pump device in thisembodiment 1 is constructed such that the contents which remains in theupper portion of the bag 1 may be guided in a downward direction and canbe delivered completely, even though the annulus 44 with the window isnot loaded in position on the pump 33.

That is, the pump device in this embodiment has its suction portion 34formed as an opening in the bottom surface of the cylindrical connection46 to be loaded on the lower end of the pump, rather than a cylindricalconfiguration.

This connection 46 is provided by integrally forming the firstcylindrical portion 47a with the second cylindrical portion 47b which isformed at the lower portion of the first cylindrical portion and has aouter diameter smaller than that of the cylindrical portion.

The first cylindrical portion 47a is formed at its outer circumferentialsurface with a plurality of grooves 48 each extending in a tangentialdirection and having a step-like bottom surface, these grooves 48 beingprovided to maintain an uniform spacing in the circumferentialdirection. Each of these grooves 48 opens outwardly at the lower end ofthe first cylindrical portion 47a, that is, at the end of the secondcylindrical portion 47b. The bottom surface of this second cylindricalportion 47b, that is, the bottom surface of the connection 46 isprovided with the rod 41 in the same manner as that for the pump deviceof the seventh embodiment shown in FIG. 26. The rod 41 is whollyidentical with that shown in the previous seventh embodiment, and so itsdescription is omitted.

In this manner, by forming the cylindrical connection 46 which is loadedon the lower end of the pump 33, and then defining a groove portion 48which extends in the axial direction around the circumferential surfaceof the connection, the contents which tend to settle down upon the upperend of the bag which has been shrunk can flow in a downward directionpassing through these groove portion 48, and discharged completely.

Industrial Applicability

The present invention is useful when it is embodied as a containercontaining volatile contents, such as, for example, a bottle foragricultural chemicals which tend to vaporize and lose their weight, ora container in which cosmetics and pharmaceutical are contained.Moreover, the present invention will be applicable as a container inwhich a content-emptying pump is provided at the mouth portion and isused to suck the contents for discharge to the outside.

We claim:
 1. A laminated bottle comprising:a bottle body having a bottlemouth at an upper portion thereof and a bottom portion at a lowerportion thereof, said bottle including at least one outer layer made ofa synthetic resin and at least one inner layer made from a flexiblesynthetic resin; a bonding band provided longitudinally along saidbottle body between said bottle mouth and said bottle bottom, saidbonding band at least partially bonding said at least one inner layer toan adjacent said at least one outer layer, said at least one inner layerbeing freely peelable from said at least one outer layer at portions ofsaid bottle body not bonded by said bonding band; a rib being formedalong a bottom parting line of said bottle, said rib bonding each ofsaid at least one inner layer to one another; a slit being formed insaid at least one outer layer on said bottom portion of said bottle bodyproviding an air entrance for air flow between said at least one outerlayer and said at least one inner layer; and a lock portion provided onat least a portion of said bottom portion of said bottle body, said lockportion integrally retaining said at least one inner layer to said atleast one outer layer.
 2. The laminated bottle as claimed in claim 1,wherein said at least one inner layer comprises a first layer and asecond layer, said first layer and said second layer being bondedtogether at said rib, said first layer being adjacent said at least oneouter layer but not bonded thereto at said rib, said slit allowing airto pass between said at least one outer layer and said first layer. 3.The laminated bottle as claimed in claim 1, wherein said at least oneouter layer is made from polyethylene and said at least one inner layeris made from nylon, said at least one inner layer made of nylon beingprovided with a resin layer of reduced moisture permeability.
 4. Thelaminated bottle as claimed in claim 1, wherein said lock portion isprovided with convex and concave portions in said bottom portion of saidbottle body, said convex and concave portions forming an overhangingsection, said lock portion being formed by engagement of said at leastone inner layer with said at least one outer layer at said overhangingsection.
 5. The laminated bottle as claimed in claim 1, wherein saidlock portion is a portion having a C-shaped cross-section provided atsaid bottom portion of said bottle body.
 6. The laminated bottle asclaimed in claim 1, wherein said lock portion is provided on said bottomportion on a side opposite said bonding band.
 7. The laminated bottle asclaimed in claim 1, wherein said bonding band is a continuous band. 8.The laminated bottle as claimed in claim 1, wherein said bonding bandextends from said bottle mouth to and including part of said bottomportion.
 9. The laminated bottle as claimed in claim 1, wherein morethan one bonding band is provided.
 10. The laminated bottle as claimedin claim 1, wherein said slit in said outer layer formed on said bottomportion of said container body is elevated from a lowermost extremity ofsaid bottom portion.
 11. The laminated bottle as claimed in claim 10,wherein said bottom portion of said container body includes a pair ofparallel projections having a recess therebetween, a valley having acentral valley portion being located transverse to said recess.
 12. Thelaminated bottle as claimed in claim 11, wherein said pair of parallelprojections are transversely located relative to a parting line of saidbottle and a sub-recess sandwiches said rib therebetween.
 13. Thelaminated bottle as claimed in claim 10, wherein a central portion ofsaid bottom portion of said bottle body includes a recess formed aroundsaid rib and at least three outward projections are provided on saidbottom portion around said recess.